We caught up with Alex Steffen of World Changing for SXSW Eco. Alex was the event's opening keynote speaker on Tuesday night, hear what he has to say about SXSW Eco and how it compares to SXSW proper.As a side note, we kinda look like twinsies, eh? Of course, I look more like the "before" picture. Alex has been doing an awesome job at getting into shape. Me, not so much.